Amazon cost to serve falls again despite $28.3 billion shipping bill

Amazon's third-quarter numbers show two cost stories running in parallel. On one side, the company is pouring money into AI infrastructure — it expects to spend $220 billion on data centers in 2026, with CEO Andy Jassy telling investors to expect 'meaningfully more' in 2027. On the other, the mundane business of moving boxes is getting cheaper per order, a trend CFO Brian Olsavsky has now sustained for four consecutive years. The gap between the two is the point: shipping cost growth decelerated to 11% from 19% two quarters earlier, even as units sold rose 12%.

The fulfillment network itself is where those two stories meet. Amazon has doubled its fleet of robotic arms such as Cardinal and Sparrow in 2026, and Jassy described the company's 1-million-robot network as already having a significant impact on cost structure, productivity and safety — while calling that impact small compared with what he expects over the next five years. Leaked internal documents reported by the New York Times last October suggested Amazon aims to automate 75 percent of fulfillment operations and build dozens of robotics-centric facilities by the end of 2027, though the company has not confirmed those targets publicly.

The tension for investors is that efficiency gains did not translate into a clean beat. Revenue of $201.9 billion and EPS of $1.89 fell short of Bloomberg analyst consensus, and the stock dropped 7 percent after hours amid a wider tech selloff. Amazon's guidance for fourth-quarter net sales of $240 billion to $247 billion implies 12 percent to 16 percent growth, but Olsavsky warned that fuel and line-haul inflation will be higher in the fourth quarter than in the third — a reminder that the cost-to-serve trend, however consistent, is not immune to input prices.